I have no idea. After I fixed the issue, I even tried disabling SIP, then enabling it again. It's still randomly removing the symlink. (well, as of last night around 10pm. I haven't opened the computer since then)
That computer has been through a lot, though. So it's totally possible that I did something stupid to permafuck SIP.
That computer has been through a lot, though. So it's totally possible that I did something stupid to permafuck SIP.